Previous studies have variously linked regional variation in sociosexual orientation to measures of health, scarcity of female mates, and wealth. However, since these variables may be inter-related, it is unclear what best predicts variation in sociosexual orientation. To address this issue, we investigated regional variation in sociosexual orientation among US states. We used factor analysis to derive orthogonal health, scarcity of female mates, and wealth factors from state-level data and used multilevel modeling to investigate which of these factors best predicts participantsí (N=4453) scores on the revised Sociosexual Orientation Inventory. Analyses showed that sociosexual orientation was best predicted by the scarcity of female mates factor and that men and women reported more restricted sociosexual orientations when female mates were scarce. These data complement previous findings linking sociosexual orientation to operational sex ratio and extend this research to a single-country sample.
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